JPH07237694A - Storage tank for volatile liquids - Google Patents
Storage tank for volatile liquidsInfo
- Publication number
- JPH07237694A JPH07237694A JP6027967A JP2796794A JPH07237694A JP H07237694 A JPH07237694 A JP H07237694A JP 6027967 A JP6027967 A JP 6027967A JP 2796794 A JP2796794 A JP 2796794A JP H07237694 A JPH07237694 A JP H07237694A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- volatile liquid
- cooling coil
- pressure
- storage tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 53
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 238000003912 environmental pollution Methods 0.000 abstract description 5
- 239000002826 coolant Substances 0.000 abstract description 3
- 238000004904 shortening Methods 0.000 abstract description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000008235 industrial water Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- LFYJSSARVMHQJB-QIXNEVBVSA-N bakuchiol Chemical compound CC(C)=CCC[C@@](C)(C=C)\C=C\C1=CC=C(O)C=C1 LFYJSSARVMHQJB-QIXNEVBVSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
(57)【要約】
【目的】従来の欠点である環境汚染、貯留中の揮発性液
体の目減り、タンク寿命の短縮を解決できると共に、設
備的にも経済的な揮発性液体の貯蔵タンクを提供する。
【構成】揮発性液体１２を貯蔵するタンク１６内のヘッ
ドスペース２２に冷却コイル２４を設け、冷却装置２６
から冷却コイル２４内に所定温度の冷媒を流すようにし
た。これにより、揮発したガスは冷却コイル２４に接触
して熱交換し、冷却されて液化して液滴となって落下す
る。また、冷却コイル２４によりヘッドスペース２２の
雰囲気温度を下げてタンク１６内部から揮発性液体１２
の液温上昇を防ぐようにした。
(57) [Summary] [Purpose] To provide a storage tank for volatile liquids that is economical in terms of equipment, as well as being able to solve the conventional drawbacks of environmental pollution, the reduction of volatile liquids during storage, and the shortening of tank life. To do. A cooling coil 24 is provided in a head space 22 in a tank 16 for storing a volatile liquid 12, and a cooling device 26 is provided.
Therefore, the coolant having a predetermined temperature is allowed to flow in the cooling coil 24. As a result, the volatilized gas comes into contact with the cooling coil 24 to exchange heat with the cooling coil 24, and is cooled and liquefied to drop into droplets. Further, the ambient temperature of the head space 22 is lowered by the cooling coil 24 so that the volatile liquid 12 is discharged from the inside of the tank 16.
I tried to prevent the liquid temperature rise.
Description
【０００１】[0001]
【発明の利用分野】本発明は揮発性液体の貯蔵タンクに
係り、特に、ＬＰＧ、ＬＮＧ、ガソリン等の揮発性の大
きな液体を貯蔵するタンク内圧の抑制に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a volatile liquid storage tank, and more particularly to suppressing the internal pressure of a tank for storing a highly volatile liquid such as LPG, LNG or gasoline.
【０００２】[0002]
【従来の技術】タンクに貯蔵されたＬＰＧ、ＬＮＧ、ガ
ソリン、アルコール、アンモニア、冷媒類等の揮発性の
大きな液体は、外気温等の貯蔵環境温度により飽和蒸気
圧が敏感に変化する。この為、これらの揮発性液体をタ
ンクに貯蔵する場合には、タンク内圧が規定圧以上に昇
圧してタンク破壊等の危険性がないようにタンク内圧を
抑制する必要がある。2. Description of the Related Art Liquids with large volatility such as LPG, LNG, gasoline, alcohol, ammonia and refrigerants stored in a tank have a saturated vapor pressure sensitively changed depending on the storage environment temperature such as the outside temperature. Therefore, when storing these volatile liquids in the tank, it is necessary to suppress the tank internal pressure so that the tank internal pressure rises above a specified pressure and there is no risk of tank destruction or the like.
【０００３】従来の揮発性液体の貯蔵タンクは、貯蔵し
ている揮発性液体が揮発してタンクの内圧が規定圧以上
になると、タンク頂部に設けられた安全弁が作動して揮
発したガスを大量に大気に放出することによりタンク内
圧の昇圧を抑制している。また、タンク表面に散水して
タンク内の揮発性液体の液温を下げ、揮発性液体の飽和
蒸気圧を低くすることにより、タンク内圧の昇圧を抑制
することも行われている。In a conventional volatile liquid storage tank, when the stored volatile liquid volatilizes and the internal pressure of the tank exceeds a specified pressure, a safety valve provided at the top of the tank operates and a large amount of the volatilized gas is discharged. The internal pressure of the tank is suppressed by releasing it into the atmosphere. Further, it is also practiced to reduce the temperature of the volatile liquid in the tank by sprinkling water on the surface of the tank and lower the saturated vapor pressure of the volatile liquid to suppress the increase in the tank internal pressure.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、安全弁
からガスを放出してタンク内圧の昇圧を抑制する従来の
揮発性液体の貯蔵タンクは、ガスが大量に大気に放出さ
れるため環境汚染になるという欠点がある。特に、毒性
や発火性のある揮発性液体の場合にはなおさら問題であ
る。また、ガスを大量に放出することによりタンク貯蔵
中に揮発性液体が目減りする欠点がある。However, the conventional volatile liquid storage tank that releases gas from the safety valve to suppress the increase in tank internal pressure is said to cause environmental pollution because a large amount of gas is released to the atmosphere. There are drawbacks. This is even more problematic in the case of volatile liquids that are toxic and flammable. In addition, there is a drawback that a large amount of gas is discharged, so that the volatile liquid is depleted during storage in the tank.
【０００５】一方、タンク表面に散水してタンク内圧の
昇圧を抑制する揮発性液体の貯蔵タンクは、タンク表面
に水垢、浮遊粉塵等が付着してタンクが汚れタンク外観
を悪くするばかりでなく、タンクの塗装が剥がれるの
で、タンクが錆びやすくなりタンク寿命が短くなるとい
う欠点がある。また、水の散水費用がかかると共に、散
水配管等の散水設備や散水した水の排水路等の設備が必
要になるので、設備コスト及びランニングコストが嵩む
という欠点がある。On the other hand, in a storage tank of a volatile liquid which sprinkles water on the surface of the tank and suppresses an increase in the internal pressure of the tank, not only does the tank get dirty and the appearance of the tank deteriorates due to water stains, floating dust and the like adhering to the surface of the tank. Since the paint on the tank is peeled off, the tank is prone to rust and shortens the life of the tank. Further, there is a drawback that the cost of sprinkling water is high and a sprinkling facility such as a sprinkling pipe and a drainage channel of sprinkled water are required, resulting in increased facility cost and running cost.
【０００６】本発明は、このような事情に鑑みてなされ
たもので、従来の欠点である環境汚染、貯留中の揮発性
液体の目減り、タンク寿命の短縮を解決できると共に、
設備的にも経済的な揮発性液体の貯蔵タンクを提供する
ことを目的とする。The present invention has been made in view of the above circumstances, and can solve the conventional drawbacks of environmental pollution, reduction of volatile liquid during storage, and shortening of tank life.
An object is to provide a storage tank for volatile liquids that is economical in terms of equipment.
【０００７】[0007]
【課題を解決する為の手段】本発明は、前記目的を達成
する為に、揮発性液体を貯蔵する貯蔵タンク内の頂部空
間に、揮発した前記揮発性液体のガスを冷却して液化さ
せる熱交換手段を設けたことを特徴とする。In order to achieve the above object, the present invention provides a heat for cooling and liquefying the gas of the volatilized volatile liquid in the top space of a storage tank for storing the volatile liquid. It is characterized in that an exchange means is provided.
【０００８】[0008]
【作用】本発明によれば、揮発性液体を貯蔵するタンク
内の頂部空間（以下、ヘッドスペースという）に熱交換
手段を設け、揮発した前記揮発性液体のガスを熱交換手
段で冷却して液化させると共に、ヘッドスペースの雰囲
気温度を下げてタンク内部から揮発性液体の液温上昇を
防ぐようにしたので、タンク内圧の昇圧を効果的に抑制
することができる。According to the present invention, heat exchange means is provided in the top space (hereinafter referred to as head space) in the tank for storing the volatile liquid, and the gas of the volatilized volatile liquid is cooled by the heat exchange means. Since the temperature of the atmosphere in the head space is lowered and the liquid temperature of the volatile liquid is prevented from rising from the inside of the tank while the liquid is liquefied, the increase in the tank internal pressure can be effectively suppressed.
【０００９】また、タンクのヘッドスペースの圧力を検
知する圧力検知手段を設け、前記圧力検知手段で検知さ
れる圧力の大小により前記熱交換手段の運転・停止を行
うようにしたので、効率的にタンク内圧の昇圧を抑制す
ることができる。Further, pressure detecting means for detecting the pressure in the head space of the tank is provided, and the heat exchanging means is operated / stopped depending on the magnitude of the pressure detected by the pressure detecting means. It is possible to suppress an increase in tank internal pressure.
【００１０】[0010]
【実施例】以下添付図面に従って本発明に係る揮発性液
体の貯蔵タンクの好ましい実施例について詳説する。本
発明の揮発性液体の貯蔵タンク１０は、ＬＰＧ、ＬＮ
Ｇ、ガソリン、アルコール、アンモニア、冷媒類等の揮
発性の大きな全ての液体の貯蔵に適用できるが、本実施
例では、揮発性液体としてアルコール１２を貯蔵する例
で以下に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a volatile liquid storage tank according to the present invention will be described in detail below with reference to the accompanying drawings. The volatile liquid storage tank 10 of the present invention is made of LPG, LN
The present invention can be applied to the storage of all highly volatile liquids such as G, gasoline, alcohol, ammonia, and refrigerants, but in this embodiment, an example in which the alcohol 12 is stored as a volatile liquid will be described below.
【００１１】図１は、本発明の揮発性液体の貯蔵タンク
１０の一例を示す縦断面図である。タンク基礎１４の上
に固定された球形状のタンク１６は、直径が約８ｍで約
３００Ｋｌの容積を有する。アルコール１２は流入管１
８から流入してタンク１６内に貯蔵され、使用時に流出
管２０を通って抜き出される。また、タンク１６内の上
部に形成されるヘッドスペース２２は、少なくともタン
ク１６容積の約１０％（約３０Ｋｌ）の容量を確保する
ようにアルコール１２最大貯蔵量が決められる。また、
ヘッドスペース２２には、その水平面の略全域にわたっ
て熱交換コイル２４が配設され、熱交換コイル２４の両
端はタンク１６外に設けられた冷却装置２６に接続され
る。これにより、熱交換コイル２４内には、冷却装置２
６で所定温度に冷却された冷媒が流される。また、ヘッ
ドスペース２２には、ヘッドスペース２２の圧力を検知
する圧力計２８が設けられると共に、圧力計２８はケー
ブル３０を介してコントローラ３２に接続される。更
に、コントローラ３２はケーブル３４を介して前記冷却
装置２６に接続される。そして、コントローラ３２は、
圧力計２８からの圧力値が予め設定した設定圧力以上に
なったら冷却装置２６を運転し、設定圧力以下になった
ら冷却装置２６を停止するように制御する。FIG. 1 is a longitudinal sectional view showing an example of a volatile liquid storage tank 10 of the present invention. The spherical tank 16 fixed on the tank foundation 14 has a diameter of about 8 m and a volume of about 300 Kl. Alcohol 12 is inflow pipe 1
8 is stored in the tank 16 and is withdrawn through the outflow pipe 20 at the time of use. Further, the head space 22 formed in the upper portion of the tank 16 has a maximum storage amount of the alcohol 12 determined so as to secure a capacity of at least about 10% (about 30 Kl) of the volume of the tank 16. Also,
A heat exchange coil 24 is provided in the head space 22 over substantially the entire horizontal surface thereof, and both ends of the heat exchange coil 24 are connected to a cooling device 26 provided outside the tank 16. As a result, the cooling device 2 is provided in the heat exchange coil 24.
At 6, the coolant cooled to a predetermined temperature is flowed. Further, the head space 22 is provided with a pressure gauge 28 for detecting the pressure of the head space 22, and the pressure gauge 28 is connected to a controller 32 via a cable 30. Further, the controller 32 is connected to the cooling device 26 via a cable 34. Then, the controller 32
The cooling device 26 is controlled to operate when the pressure value from the pressure gauge 28 becomes equal to or higher than a preset set pressure, and the cooling device 26 is stopped when the pressure value becomes equal to or lower than the preset pressure.
【００１２】ところで、高圧ガス取締法により、タンク
１６のヘッドスペース２２圧力は、４０°Ｃにおける揮
発性液体の飽和蒸気圧以下にするように規制されている
ので、設定圧力は前記飽和蒸気圧以下に設定する必要が
ある。以上の如く構成された本発明の揮発性液体の貯蔵
タンク１０の作用について説明する。By the way, according to the high pressure gas control method, the pressure of the head space 22 of the tank 16 is regulated to be equal to or lower than the saturated vapor pressure of the volatile liquid at 40 ° C. Therefore, the set pressure is equal to or lower than the saturated vapor pressure. Must be set to. The operation of the volatile liquid storage tank 10 of the present invention configured as described above will be described.
【００１３】例えば、夏場の強い日差し等によりタンク
１６が加熱されると、タンク１６内に貯蔵されているア
ルコールの液温が上昇して揮発量が大きくなるので、タ
ンク１６内圧が昇圧する。このタンク１６内圧の昇圧に
おいて、ヘッドスペース２２の圧力が圧力計２８により
検知され、検知された検知値がコントローラ３２に逐次
入力される。コントローラ３２では、検知値と予め設定
した設定値とを比較し、検知値が設定値以上になったら
冷却装置２６を運転し、冷却コイル２４内に所定温度の
冷媒を流す。これにより、揮発してガス化したアルコー
ル１２は冷却コイル２４に接触して冷却コイル内２４を
流れる冷媒と熱交換することにより冷却されて液化し、
液滴となって落下する。この結果、タンク１６内圧が低
下するので、タンク１６内圧が設定圧力以上に昇圧する
のを抑制することができる。For example, when the tank 16 is heated by strong sunlight in summer, the temperature of the alcohol stored in the tank 16 rises and the amount of volatilization increases, so that the internal pressure of the tank 16 rises. When the internal pressure of the tank 16 is increased, the pressure in the head space 22 is detected by the pressure gauge 28, and the detected values are sequentially input to the controller 32. The controller 32 compares the detected value with a preset value, and when the detected value is equal to or higher than the preset value, the cooling device 26 is operated and a coolant having a predetermined temperature is flown into the cooling coil 24. As a result, the volatilized and gasified alcohol 12 is cooled and liquefied by contacting the cooling coil 24 and exchanging heat with the refrigerant flowing in the cooling coil 24,
Drops as droplets. As a result, the internal pressure of the tank 16 decreases, so that the internal pressure of the tank 16 can be suppressed from rising above the set pressure.
【００１４】また、ヘッドスペース２２に冷却コイル２
４を設けたことにより、揮発したアルコール１２が冷却
コイル２４に接触して熱交換する以外に、ヘッドスペー
ス２２の雰囲気温度を下げる効果があり、タンク１６内
部からアルコール１２の液温上昇を効率良く抑制させる
ことができるので、従来のタンク表面に散水する方法に
比べ効果的にタンク内圧を抑制することができる。Further, the cooling coil 2 is provided in the head space 22.
By providing No. 4, the volatilized alcohol 12 has the effect of lowering the ambient temperature of the head space 22 in addition to contacting the cooling coil 24 and exchanging heat, and efficiently raises the liquid temperature of the alcohol 12 from the inside of the tank 16. Since it can be suppressed, the tank internal pressure can be suppressed more effectively than the conventional method of spraying water on the tank surface.
【００１５】従って、本発明の揮発性液体の貯蔵タンク
１０を用いれば、従来の揮発性液体の貯蔵タンクのよう
に、揮発したガスを大気に放出する必要がないので、環
境汚染を招くことがないと共に、ガスの大気放出による
揮発性液体の目減りをおこすことがない。また、タンク
１６表面に放水して揮発性液体を冷却する必要がないの
でタンク１６外観を損ねることがないと共に、タンク１
６に錆が発生することもないのでタンク１６寿命を長く
できる。Therefore, when the volatile liquid storage tank 10 of the present invention is used, unlike the conventional volatile liquid storage tank, it is not necessary to release the vaporized gas to the atmosphere, which may cause environmental pollution. In addition, there is no loss of volatile liquid due to atmospheric release of gas. Further, since it is not necessary to spray water on the surface of the tank 16 to cool the volatile liquid, the appearance of the tank 16 is not spoiled and the tank 1
Since the rust does not occur on No. 6, the life of the tank 16 can be extended.
【００１６】尚、本実施例では、冷却コイルを冷却装置
に接続して冷却コイル内に流す冷媒を冷却するようにし
たが、冷却コイルの入口を工業用水ポンプに接続すると
共に、出口を排水路に延ばして、冷却コイルに工業用水
を一方通行で流すようにしてもよい。要は、ヘッドスペ
ースに揮発した揮発性液体を冷却して液化できる設備で
あればよい。また、本実施例では、球形状のタンクで説
明したが、これに限定されるものではなくコーンルーフ
型のタンク等でもよい。In this embodiment, the cooling coil is connected to the cooling device to cool the refrigerant flowing in the cooling coil. However, the inlet of the cooling coil is connected to the industrial water pump and the outlet is connected to the drainage channel. The industrial water may flow through the cooling coil in one way. The point is that any equipment can be used as long as it can cool and liquefy the volatile liquid that has volatilized in the head space. Further, although the spherical tank is described in the present embodiment, the present invention is not limited to this, and a cone roof type tank or the like may be used.
【００１７】[0017]
【発明の効果】以上説明したように、本発明に係る揮発
性液体の貯蔵タンクによれば、揮発性液体を貯留するタ
ンク内の頂部空間に熱交換手段を設け、揮発した前記揮
発性液体のガスを熱交換手段で冷却して液化させるよう
にした。これにより、効果的にタンク内圧の昇圧を抑制
できると共に、従来の揮発性液体の貯蔵タンクの欠点で
あった環境汚染、貯蔵中の揮発性液体の目減り、タンク
寿命が短くなる等の問題点を解決することができる。As described above, according to the volatile liquid storage tank of the present invention, the heat exchange means is provided in the top space in the tank for storing the volatile liquid, and the volatile liquid of the volatile liquid is stored. The gas was cooled by a heat exchange means to be liquefied. As a result, it is possible to effectively suppress the increase of the tank internal pressure, and there are problems such as environmental pollution which is a drawback of the conventional volatile liquid storage tank, depletion of volatile liquid during storage, and shortened tank life. Can be resolved.
【図１】図１は、本発明の揮発性液体の貯蔵タンクの一
例を示す断面図FIG. 1 is a cross-sectional view showing an example of a volatile liquid storage tank of the present invention.
１０…揮発性液体の貯蔵タンク １２…アルコール（揮発性液体） １６…タンク ２２…ヘッドスペース ２４…冷却コイル ２６…冷却装置 ２８…圧力計 ３２…コントローラ 10 ... Storage tank for volatile liquid 12 ... Alcohol (volatile liquid) 16 ... Tank 22 ... Headspace 24 ... Cooling coil 26 ... Cooling device 28 ... Pressure gauge 32 ... Controller
───────────────────────────────────────────────────── フロントページの続き (72)発明者 橋本 守人 千葉県野田市野田339番地 キッコーマン 株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Morito Hashimoto 339 Noda, Noda City, Chiba Prefecture Kikkoman Corporation
Claims (2)
に、揮発した前記揮発性液体のガスを冷却する熱交換手
段を設けたことを特徴とする揮発性液体の貯蔵タンク。1. A storage tank for a volatile liquid, characterized in that heat exchange means for cooling the gas of the volatile liquid is provided in the top space in the tank for storing the volatile liquid.
段を設け、前記圧力検知手段で検知される圧力の大小に
より前記熱交換手段を運転・停止することを特徴とする
請求項１揮発性液体の貯蔵タンク。2. The volatility according to claim 1, further comprising: a pressure detecting means for detecting the pressure in the top space, wherein the heat exchanging means is operated / stopped depending on the magnitude of the pressure detected by the pressure detecting means. Liquid storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6027967A JPH07237694A (en) | 1994-02-25 | 1994-02-25 | Storage tank for volatile liquids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6027967A JPH07237694A (en) | 1994-02-25 | 1994-02-25 | Storage tank for volatile liquids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07237694A true JPH07237694A (en) | 1995-09-12 |
Family
ID=12235669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6027967A Pending JPH07237694A (en) | 1994-02-25 | 1994-02-25 | Storage tank for volatile liquids |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07237694A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2082448A4 (en) * | 2006-11-16 | 2010-12-22 | Bic Soc | Fuel cartridge for fuel cells |
-
1994
- 1994-02-25 JP JP6027967A patent/JPH07237694A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2082448A4 (en) * | 2006-11-16 | 2010-12-22 | Bic Soc | Fuel cartridge for fuel cells |
| US8822888B2 (en) | 2006-11-16 | 2014-09-02 | Societe Bic | Fuel cartridge for fuel cells |
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